So, anyone know approximately how much space it would take to download street level maps for the whole U.S. using MaemoMapper? A friend is taking a couple of months road trip and wants to know how big of a card he will need. He plans on doing a lot of camping, so internet access will be an issue.

From what I've seen of the maping programs, I don't think the n800 is well suited for his task, but he has one already, so he'd like to get it to work if he can.